Illinois' legislative leaders say they've reached a tentative agreement in the state's school funding fight, but details are still being worked out.

Senate Republican Leader Bill Brady and House Republican Leader Jim Durkin issued a statement Thursday saying there's ``agreement in principle,'' but wording won't be released until ``drafts have been reviewed.''

Democratic leaders Senate President John Cullerton and House Speaker Michael Madigan say in a statement that they've reached ``agreement in concept.''

The four are expected to meet again in Springfield on Sunday, a day before the House convenes.

There's wide agreement that Illinois' 20-year-old school funding formula is unfair. But Democrats and Republicans have disagreed over fixes.

The budget legislators approved last month over Republican Gov. Bruce Rauner's objections requires a new formula for schools to get state money this year.